Specifically, Biopharmaceutics and Pharmacokinetics, encompasses the absorption, distribution, metabolism and excretion of drugs in animals and humans, and the relationship between drug concentration and effect; Pharmaceutical Biotechnology includes molecular biology, immunology, and aspects of the delivery of peptide and protein drugs; Pharmaceutical Analysis involves the application of spectroscopy, chromatography, extraction, electrophoresis, immunoassays, and radioisotope assays to drug determination; Drug Delivery includes physical, biological and chemical approaches to drug delivery, formulation and evaluation of dosage forms; Drug Discovery is associated with receptor-oriented/retrometabolic drug design, computer assisted drug design, chemical/physical approaches to controlled drug delivery, pharmacokinetic-pharmacodynamic correlation approach to improved therapeutic index.